白鹤滩拱坝坝后消能建筑物谷幅变形适应性研究  

Study on Adaptability of Valley Width Deformation of Energy Dissipation Structures Building Behind Baihetan Arch Dam

作　　者：胡若轩 徐建荣 彭育 赵兰浩[1] HU Ruoxuan;XU Jianrong;PENG Yu;ZHAO Lanhao(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;PowerChina Huadong Engineering Corporation,Hangzhou 311122,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《华北水利水电大学学报（自然科学版）》2022年第6期26-32,共7页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家重点研发计划项目(2018YFC0407102)。

摘　　要：国内已建特高拱坝在蓄水过程中均出现了不同程度的谷幅收缩现象,这不但影响拱坝自身的工作性态,而且也影响着枢纽区其他附属水工建筑物的安全运行。为了定量研究设置弹性结构缝是否有助于白鹤滩拱坝坝后消能建筑物适应谷幅收缩变形,通过边界位移法模拟谷幅收缩变形,利用有限单元法计算反拱型水垫塘和二道坝的位移和应力情况,并将不同缝宽的计算结果进行对比分析。结果表明:在谷幅收缩变形作用下消能建筑物会产生较大的位移和应力,最大位移和应力随变形量增大而增加;设置弹性结构缝可以有效改善建筑物的应力状态,且在一定范围内缝宽越大改善效果越明显。The ultra-high arch dams built in China show different degrees of valley width shrinkage in the impoundment process,which not only affects the working behavior of the arch dam itself,but also affects the safe operation of other auxiliary hydraulic structures in the hub area.In order to study quantitatively whether the elastic joints can help the energy dissipation building adapt to the valley shrinkage deformation behind Baihetan dam,the valley deformation was simulated by the boundary displacement method,and the displacement and stress responses of the inverted arch water cushion pond and the secondary dam were calculated by the finite element method,and the calculation results of different seam widths were compared and analyzed.The research results show that the energy-dissipating buildings will produce large displacement and stress under the action of valley shrinkage deformation,and the maximum displacement and stress will increase with the increase of deformation.Setting elastic structural joints can effectively improve the stress state of the building,and within a certain range,the greater the joint width,the more obvious the improvement effect.

关 键 词：谷幅变形 反拱型水垫塘 二道坝 弹性结构缝 应力状态 

分 类 号：TV653[水利工程—水利水电工程]